Thanks guys, the hammers and fences are clones of the ones on the Purdey. Engraving "style" and coverage much the same. As stated before "back locks", I think that is the correct term. British proof marks. The lever hinges down from the round body action and operates much like a falling block rifle. Yes Pete there are many variants, I collect them as I find them, so far -Lefaucheux,Jones? rotary under lever, left side lever, many top levers and now this.
Took several pics. and can forward to some one willing to post them . I'm going to take the gun apart shortly for cleaning & stock repair - might find some "hidden" info. --- John Can.